Investigation of Tool Life in Turning of AISI D6 Steel

Abstract

In this study, AISI D6 cold work tool steel was machined on lathe by using the CBN tools. AISI D6 work pieces hardness before heat treatment was 22 HRc. Heat treatments were implemented to the work piece at 860-880°C for 40 minutes and it was cooled in oil. In addition the work piece was applied tempering procedure for three times at intervals of 3 hours. The hardness of the work piece after heat treatment was 62 HRc. Experiments were conducted under different depth of cuts, cutting speeds and feed rates by using factorial experimental design on a lathe. The cutting speed of 50, 100 and 150, feed rate of 0.1, 0.15 and 0.2 mm/rev, depth of cut of 0.2, 0.4 and 0.6 125 mm were chosen as the experimental conditions. According to the obtained experimental, it was seen that when the cutting speed, feed rate and depth of cut increases and tool life decreases fast.

Experimental investigation into machinability of hardened AISI D6 steel using newly developed AlTiSiN coated carbide tools under sustainable finish dry hard turning

“…During finish turning hardened AISI D6 (60 HRC) cold work tool steel with ceramic and cubic boron nitride cutting tools, Kacal and Yıldırım 12 presented that grey relational analysis represents a powerful approach and can offer to scientific researchers as well industrial metalworking a helpful optimization procedure for various combinations of the workpiece and the cut material tool. For the same workpiece material, Parlak et al 13 studied the effect of cutting parameters on tool life of CBN insert. However, other machinability characteristics like tool wear, cutting force and chip morphology have not been considered for study which is essential for hard turning.…”

“…Although few researchers 12–15 have been studied the hard turning of AISI D6 steel by expensive ceramic and CBN cutting tools owing to longer tool life. However, the application of low-cost new-generation coated carbide tools in substitute of CBN and ceramics is less outlined in finish hard turning process, which finds a worthy investigation from the economical point-of-view.…”

Analysis of the Dynamic Stability of Ball-End Milling of AISI D6 Hardened Steel

“…However, machine form tools with this material is a difficult task. [1][2] Long ball-end mills with high length to diameter ratios are frequently required to machine deep cavities of moulds and dies. The low stiffness of the system can lead to excessive vibration between tool and workpiece for certain operation conditions resulting in a poor surface finishing and reduced tool life.…”